The allergy medication Benadryl typically stays in the system for four to six hours. Most products instruct users to take the stated dosage every four to six hours as needed, while not exceeding six doses in a single day, per instructions on the package label.Know More
The antihistamine provides temporary relief from seasonal allergies, hay fever, allergic reactions and other upper respiratory allergies and is also effective in treating runny nose and itchy or watery eyes.
Benadryl is available in capsule, tablet and liquid form and as a topical analgesic.
Common side effects of the drug include sedation, tiredness, sleepiness, dizziness, disturbed coordination, drying and thickening of oral and other respiratory secretions and stomach distress, according to the medical experts at rxlist.com.Learn more about Medications & Vitamins
Tizanidine stays in the body between three to six hours, with its peak effect during the second and third hour, according to Drugs.com. Another dose can be taken six to eight hours later, but no more than three doses should be taken in one day.Full Answer >
HealthTap says it takes four to six hours for the effects of NyQuil to fade. Drugs.com says that NyQuil is intended to be taken every six hours as needed to treat cold symptoms.Full Answer >
Fresh cheesecake that has not been opened stays fresh in the refrigerator for five to six days past the "sell by" date. In the freezer, the dessert stays fresh for six to eight months past the printed date.Full Answer >
If medication is past its expiration date, discard it and replace it with new product, says the makers of Benadryl. However, many medications are safe and effective well past their expiration dates, according to The Allergy Clinic.Full Answer >